-be refused by your rsync server. The full names of the options must be
-used (i.e., you must use "checksum" not "c" to disable checksumming).
+be refused by your rsync server.
+You may specify the full option name, its one-letter abbreviation, or a
+wild-card string that matches multiple options.
+For example, this would refuse --checksum (-c) and all the options that
+start with "delete":
+
+quote(refuse options = c delete*)
+